我如何计算在ActionScript 3给定的十六进制颜色深浅？ [英] How can I calculate shades of a given hex color in actionscript 3?

问题描述

我需要一种方法来计算基础上提供的一个更轻的十六进制颜色（S）。我知道我可以使用颜色变换，但是，我需要生成一个梯度的实际值。

I need a way to calculate lighter hex color(s) based on a provided one. I realize I could use a color transform, but I need the actual value in order to generate a gradient.

在此先感谢您的帮助 -

Thanks in advance for any help -

B

推荐答案

下面的一些东西给我拔掉了颜色utils的。听起来像makeGradient可能对你有用。

Here's some stuff pulled out of my Color utils. Sounds like makeGradient might be useful to you.

    /**
     * Return a gradient given a color.
     *
     * @param color      Base color of the gradient.
     * @param intensity  Amount to shift secondary color.
     * @return An array with a length of two colors.
     */
    public static function makeGradient(color:uint, intensity:int = 20):Array
    {
        var c:Object = hexToRGB(color);
        for (var key:String in c)
        {
            c[key] += intensity;
            c[key] = Math.min(c[key], 255); // -- make sure below 255
            c[key] = Math.max(c[key], 0);   // -- make sure above 0
        }
        return [color, RGBToHex(c)];
    }

    /**
     * Convert a uint (0x000000) to a color object.
     *
     * @param hex  Color.
     * @return Converted object {r:, g:, b:}
     */
    public static function hexToRGB(hex:uint):Object
    {
        var c:Object = {};

        c.a = hex >> 24 & 0xFF;
        c.r = hex >> 16 & 0xFF;
        c.g = hex >> 8 & 0xFF;
        c.b = hex & 0xFF;

        return c;
    }

    /**
     * Convert a color object to uint octal (0x000000).
     *
     * @param c  Color object {r:, g:, b:}.
     * @return Converted color uint (0x000000).
     */
    public static function RGBToHex(c:Object):uint
    {
        var ct:ColorTransform = new ColorTransform(0, 0, 0, 0, c.r, c.g, c.b, 100);
        return ct.color as uint
    }

另外，不记得在那里我得到这个从不过这些静态函数将生成一个给定颜色和谐清单：

Also, can't recall where I got this from but these static function will generate a harmony list given a color:

    /**
     * Convert RGB bits to a hexcode
     *
     * @param r  Red bits
     * @param g  Green bits
     * @param b  Blue bits
     * @return A color as a uint
     */
    public static function convertToHex(r:uint, g:uint, b:uint):uint
    {
        var colorHexString:uint = (r << 16) | (g << 8) | b;
        return colorHexString;
    }

    /**
     * Get a series of complements of a given color.
     *
     * @param color   Color to get harmonies for
     * @param weight  Threshold to apply to color harmonies, 0 - 255
     */
    public static function getHarmonies(color:uint, weight:Number):Array
    {
        var red:uint = color >> 16;
        var green:uint = (color ^ (red << 16)) >> 8;
        var blue:uint = (color ^ (red << 16)) ^ (green << 8);

        var colorHarmonyArray:Array = new Array();
        //weight = red+green+blue/3;

        colorHarmonyArray.push(convertToHex(red, green, weight));
        colorHarmonyArray.push(convertToHex(red, weight, blue));
        colorHarmonyArray.push(convertToHex(weight, green, blue));
        colorHarmonyArray.push(convertToHex(red, weight, weight));
        colorHarmonyArray.push(convertToHex(weight, green, weight));
        colorHarmonyArray.push(convertToHex(weight, weight, blue));

        return colorHarmonyArray;
    }

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